CN115282489B - Magnetic stimulation device and magnetic stimulation equipment - Google Patents
Magnetic stimulation device and magnetic stimulation equipment Download PDFInfo
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- CN115282489B CN115282489B CN202210744897.3A CN202210744897A CN115282489B CN 115282489 B CN115282489 B CN 115282489B CN 202210744897 A CN202210744897 A CN 202210744897A CN 115282489 B CN115282489 B CN 115282489B
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- 230000000638 stimulation Effects 0.000 title claims abstract description 162
- 238000005728 strengthening Methods 0.000 claims abstract description 3
- 238000004804 winding Methods 0.000 claims description 21
- 239000010410 layer Substances 0.000 claims description 18
- 239000002356 single layer Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 20
- 238000011491 transcranial magnetic stimulation Methods 0.000 description 9
- 230000006698 induction Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 210000005036 nerve Anatomy 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000003710 cerebral cortex Anatomy 0.000 description 2
- 230000002490 cerebral effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 210000003625 skull Anatomy 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000003557 neuropsychological effect Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 210000000578 peripheral nerve Anatomy 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/004—Magnetotherapy specially adapted for a specific therapy
- A61N2/006—Magnetotherapy specially adapted for a specific therapy for magnetic stimulation of nerve tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/02—Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
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Abstract
The invention provides a magnetic stimulation device and magnetic stimulation equipment, relates to the technical field of biomedicine, and solves the problem of large weight of the magnetic stimulation device. The magnetic stimulation device comprises two first cylindrical magnetic cores and coils, wherein the first cylindrical magnetic cores and the coils are arranged at intervals, and the coils are respectively wound on the peripheries of the two first cylindrical magnetic cores; wherein, the coil is used for generating a magnetic field when current passes through; the first cylindrical magnetic core is used for strengthening the magnetic field so as to stimulate the target object through the strengthened magnetic field, and the purpose of reducing the weight of the magnetic stimulation device under the condition of providing enough magnetic stimulation intensity is achieved.
Description
Technical Field
The invention relates to the technical field of biomedicine, in particular to a magnetic stimulation device and magnetic stimulation equipment.
Background
Transcranial magnetic stimulation (Transcranial Magnetic Stimulation, TMS) is a stimulation technique that facilitates the penetration of a powerful alternating magnetic field through the skull and the induction of current in the cerebral cortex to stimulate the cerebral nerves.
In the prior art, transcranial magnetic stimulation is typically accomplished using a magnetic stimulation device that includes a "C" shaped core and a coil wound around the "C" shaped core. When the coil is electrified, current is generated to generate a magnetic field, the C-shaped magnetic core can further strengthen the magnetic field, and transcranial magnetic stimulation is performed through the strengthened magnetic field.
Although the C-shaped magnetic core can greatly improve the magnetic stimulation intensity, the problem that the magnetic core is easy to saturate exists. In order to avoid saturation of the core, it is generally necessary to set the cross-sectional area of the "C" shaped core large enough and the magnetic path length of the "C" shaped core long, but this results in a large weight of the magnetic stimulation device.
Disclosure of Invention
The invention provides a magnetic stimulation device and a magnetic stimulation apparatus, which can reduce the weight of the magnetic stimulation device under the condition of providing enough magnetic stimulation intensity.
The present invention provides a magnetic stimulation device comprising:
the coil is wound on the outer circumferences of the two first cylindrical magnetic cores respectively.
Wherein the coil is used for generating a magnetic field when current passes through the coil.
The first cylindrical magnetic core is used for strengthening the magnetic field so as to stimulate the target object through the strengthened magnetic field.
According to the magnetic stimulation device provided by the invention, the coil is wound on the middle part of the first cylindrical magnetic core, and two ends of the first cylindrical magnetic core are exposed outside the coil.
According to the magnetic stimulation device provided by the invention, the through hole is arranged in the first cylindrical magnetic core along the axial direction.
According to the magnetic stimulation device provided by the invention, the magnetic stimulation device further comprises second cylindrical magnetic cores which are respectively arranged at the tops of the two first cylindrical magnetic cores, the first cylindrical magnetic cores and the second cylindrical magnetic cores are coaxially arranged, and the diameter of the second cylindrical magnetic cores is larger than that of the first cylindrical magnetic cores.
According to the magnetic stimulation device provided by the invention, through holes are formed in the first cylindrical magnetic core and the second cylindrical magnetic core along the axial direction, and the top end of the first cylindrical magnetic core is arranged in the through hole of the second cylindrical magnetic core.
According to the magnetic stimulation device provided by the invention, one side of the second cylindrical magnetic core, which is away from the first cylindrical magnetic core, is provided with the concave part, and one side of the first cylindrical magnetic core, which is away from the second cylindrical magnetic core, is provided with the convex part.
According to the magnetic stimulation device provided by the invention, the axes of the two first cylindrical magnetic cores form a preset included angle, one side of the two first cylindrical magnetic cores, which faces the target object, is tangential to the stimulation part of the target object, and the second cylindrical magnetic core is positioned on one side of the first cylindrical magnetic core, which is away from the stimulation part.
According to the magnetic stimulation device provided by the invention, the coils are wound in a single layer in the axial direction of the two first cylindrical magnetic cores, are wound in multiple layers in the radial direction, and the two wire ends of the coils are respectively led out from the inner ring of the circular coil which is tightly attached to the first cylindrical magnetic cores.
Wherein the directions of currents in the two circular coils wound around the two first cylindrical cores are opposite.
According to the magnetic stimulation device provided by the invention, the coils are wound in multiple layers in the axial direction of the two first cylindrical magnetic cores and are wound in multiple layers in the radial direction; when the multi-layer winding is an odd-layer winding in the axial direction, two wire heads of the coil are respectively led out from the inner ring of the circular coil deviating from the first cylindrical magnetic core; when the multi-layer winding is an even-number layer winding in the axial direction, two wire ends of the coil are respectively led out from the circular coil outer ring which is away from the first cylindrical magnetic core.
Wherein the directions of currents in the two circular coils wound around the two first cylindrical cores are opposite.
The present invention also provides a magnetic stimulation device comprising: a housing, and a magnetic stimulation device disposed within the housing; wherein the magnetic stimulation device is any one of the magnetic stimulation devices.
The invention provides a magnetic stimulation device and magnetic stimulation equipment, wherein the magnetic stimulation device comprises two first cylindrical magnetic cores and coils, wherein the first cylindrical magnetic cores and the coils are arranged at intervals, and the coils are respectively wound on the peripheries of the two first cylindrical magnetic cores. Wherein, the coil is used for generating a magnetic field when current passes through; a first cylindrical core for reinforcing a magnetic field to stimulate the target object by the reinforced magnetic field. Thus, the cylindrical magnetic core arranged in the center of the coil can effectively provide the stimulation intensity required by magnetic stimulation, and the magnetic circuit of the first cylindrical magnetic core is shorter, so that the aim of reducing the weight of the magnetic stimulation device under the condition of providing enough magnetic stimulation intensity is fulfilled.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an application scenario provided by the present invention;
FIG. 2 is a schematic diagram of a coil magnetic field distribution provided by the present invention;
FIG. 3 is a schematic diagram of a front view of the magnetic stimulation device according to the present invention;
FIG. 4 is a schematic top view of the magnetic stimulation device according to the present invention;
FIG. 5 is a schematic diagram showing a structure in which a coil provided by the invention is wound around the middle and lower ends of a first cylindrical magnetic core, and the upper end is exposed outside the coil;
FIG. 6 is a graph showing the intensity of magnetic stimulation according to the present invention;
FIG. 7 is a schematic diagram of a front view of a magnetic core of the present invention including a first cylindrical magnetic core and a second cylindrical magnetic core;
FIG. 8 is a schematic top view of a first cylindrical magnetic core and a second cylindrical magnetic core according to the present invention;
FIG. 9 is a schematic diagram of a bottom view of a first cylindrical magnetic core and a second cylindrical magnetic core according to the present invention;
FIG. 10 is a diagram showing the intensity of magnetic stimulation according to the present invention;
FIG. 11 is a schematic top view of a first cylindrical magnetic core and a second cylindrical magnetic core provided with through holes according to the present invention;
fig. 12 is a schematic bottom view of a first cylindrical magnetic core and a second cylindrical magnetic core provided with through holes according to the present invention;
FIG. 13 is a schematic diagram showing a front view of a magnetic stimulation device provided with concave and convex portions according to the present invention;
FIG. 14 is a schematic diagram of the relationship between the magnetic stimulation device and the stimulation site provided by the invention;
fig. 15 is a schematic diagram of the magnetic stimulus intensity provided by the present invention.
Reference numerals:
30: a magnetic stimulation device; 301: a first cylindrical magnetic core; 302: a coil; 303: and a second cylindrical magnetic core.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In embodiments of the present invention, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present invention, the character "/" generally indicates that the front-rear associated object is an or relationship.
The transcranial magnetic stimulation technology is a stimulation technology which is favorable for a strong alternating magnetic field to penetrate through the skull and induce current in the cerebral cortex to stimulate cerebral nerves, can be used for transcranial nerve regulation and control and peripheral nerve and muscle stimulation, and is applied to various aspects of neuropsychological department, rehabilitation department, pediatrics and the like.
For example, referring to fig. 1, fig. 1 is a schematic diagram of an application scenario provided by the present invention, in a transcranial magnetic stimulation scenario, including a magnetic stimulation device and a pulse power source for powering the magnetic stimulation device. Wherein the magnetic stimulation device shown in fig. 1 only comprises a coil, and when the magnetic stimulation device is electrified, current in the coil generates a magnetic field through the current, so that transcranial magnetic stimulation is performed through the magnetic field.
However, since the instantaneous current flowing through the coil reaches thousands of amperes or more, the pulse width of the single pulse is about 350us, the repeated stimulation frequency can reach 100Hz, and the consumption energy of the single stimulation pulse is different from tens of joules to hundreds of joules, the energy finally consumed at the transcranial magnetic stimulation part is less, and most of the energy is dissipated in the form of heat on the coil, the lead and the circuit; and in the magnetic stimulation process, air cooling and water cooling are needed to dissipate heat of the coil.
In order to solve the above-described problems of the magnetic stimulation device including only the coil, the transcranial magnetic stimulation is generally performed using a magnetic stimulation device including one "C" type magnetic core and the coil wound around the "C" type magnetic core in the prior art. Although the C-shaped magnetic core can greatly improve the magnetic stimulation intensity, the problem that the magnetic core is easy to saturate exists. In order to avoid saturation of the core, it is generally necessary to set the cross-sectional area of the "C" core large enough and the magnetic path length of the "C" core long, but this results in a large weight of the magnetic stimulation device.
In order to reduce the weight of the magnetic stimulation device and observe the magnetic field distribution of the coil under the condition of providing enough magnetic stimulation intensity, as shown in fig. 2, for example, fig. 2 is a schematic diagram of the magnetic field distribution of the coil provided by the invention, and as can be seen in combination with fig. 2, the most dense part of the magnetic field is the inner diameter part of the coil, the magnetic resistance of the inner diameter part of the coil is maximum, the magnetic field spaces are larger at two sides of the coil, and the equivalent magnetic resistance is smaller; therefore, if a cylindrical core is provided at the center of the coil, the magnetic stimulation intensity can be greatly improved, and the weight of the magnetic stimulation device can be reduced as compared with the "C" type core.
Based on the above technical concept, the present invention provides a magnetic stimulation device, and the magnetic stimulation device provided by the present invention will be described in detail by specific embodiments. It is to be understood that the following embodiments may be combined with each other and that some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 3 is a schematic diagram of a front view of a magnetic stimulation device 30 according to the present invention, and as shown in fig. 3, for example, the magnetic stimulation device 30 may include:
two first cylindrical cores 301 and coils 302 arranged at intervals, the coils 302 being wound around the outer circumferences of the two first cylindrical cores 301, respectively.
Wherein the coil 302 is configured to generate a magnetic field when a current is passed therethrough.
A first cylindrical core 301 for reinforcing a magnetic field to stimulate a target object by the reinforced magnetic field.
For easy understanding, fig. 4 is a schematic top view of the magnetic stimulation device 30 according to the present invention, and it can be seen that the magnetic stimulation device 30 includes two first cylindrical magnetic cores 301 and coils 302 disposed at intervals, and the coils 302 are wound around the outer circumferences of the two first cylindrical magnetic cores 301, respectively.
For example, the height of the first cylindrical magnetic core 301 may be any value within a range of 0.5cm to 5cm, and the diameter of the first cylindrical magnetic core 301 may be any value within a range of 4cm to 7cm, which may be specifically set according to actual needs.
Taking the first cylindrical magnetic core 301 with a height of 1cm and a diameter of 5cm as an example, the magnetic field generated by the coil 302 is reinforced by the first cylindrical magnetic core 301, and the software simulation experiment can obtain: the magnetic stimulation intensity at about 2cm below the coil 302 can be raised to 0.33T compared to the magnetic stimulation intensity of 0.27T provided by the coil 302 alone, and the first cylindrical core 301 has a weight of only 300g, effectively reducing the weight of the magnetic stimulation device 30 compared to the "C" type core.
Taking the first cylindrical magnetic core 301 with a height of 2cm and a diameter of 5cm as an example, the magnetic field generated by the coil 302 is reinforced by the first cylindrical magnetic core 301, and the software simulation experiment can obtain: the magnetic stimulation intensity at about 2cm below the coil 302 can be raised to 0.39T compared to the magnetic stimulation intensity of 0.27T provided by the coil 302 alone, and the first cylindrical core 301 has a weight of only 600g, effectively reducing the weight of the magnetic stimulation device 30 compared to the "C" type core.
It will be readily apparent from a combination of the above two examples that the greater the height of the first cylindrical core 301, the stronger the corresponding intensity of the magnetic stimulus provided, i.e. the height of the first cylindrical core 301 is directly proportional to the intensity of the magnetic stimulus provided thereby. However, the height of the first cylindrical core 301 is not excessively large, and the weight of the magnetic stimulation device 30 is increased due to the excessively large height, so that the weight reduction cannot be achieved.
For example, in the embodiment of the present invention, the first cylindrical magnetic core 301 may be formed by pressing a high-saturation magnetic powder material through a custom mold system, and has better magnetic permeability and magnetic saturation performance; or mixing the magnetic powder with adhesive such as epoxy resin and high-temperature paraffin, and pouring into shape; the magnetic core can also be formed by combining and fixing a ring-shaped magnetic core and a cylindrical magnetic core which are standard in the market through sleeving, epoxy resin can be used in the fixing method, magnetic powder can be added into the epoxy resin to improve the magnetic conductivity of a gap, and the magnetic core can be specifically arranged according to actual needs.
It can be seen that the magnetic stimulation device 30 provided by the present invention includes two first cylindrical magnetic cores 301 and coils 302 disposed at intervals, and the coils 302 are wound around the outer circumferences of the two first cylindrical magnetic cores 301, respectively. Wherein, the coil 302 is used for generating a magnetic field when current passes through; a first cylindrical core 301 for reinforcing a magnetic field to stimulate a target object by the reinforced magnetic field. Thus, the stimulation intensity required for the magnetic stimulation can be effectively provided by the cylindrical magnetic core arranged in the center of the coil 302, thereby realizing that the weight of the magnetic stimulation device 30 is reduced under the condition that the sufficient magnetic stimulation intensity is provided.
Based on the embodiment shown in fig. 3, when the coils 302 in the magnetic stimulation device 30 are wound around the outer circumferences of the two first cylindrical cores 301, the whole outer circumference of the first cylindrical cores 301 may be wound, or only a part of the outer circumference of the first cylindrical cores 301 may be wound, and the arrangement may be specifically performed according to actual needs.
In one possible scenario, in order to reduce the ineffective magnetic field energy at the upper end of the first cylindrical core 301 and guide the magnetic field closer to the magnetic stimulation site, for example, in the embodiment of the present invention, the coil 302 may be wound around the middle part of the first cylindrical core 301, and both ends of the first cylindrical core 301 are exposed to the outside of the coil 302, as shown in fig. 3 above, so that by exposing both ends of the first cylindrical core 301 to the outside of the coil 302, the ineffective magnetic field energy at the upper end of the first cylindrical core 301 can be reduced and guide the magnetic field closer to the magnetic stimulation site.
In this possible scenario, when the coil 302 is wound around the middle portion of the first cylindrical core 301, the greater the height of the first cylindrical core 301, the stronger the corresponding magnetic stimulus intensity provided, while the two ends of the first cylindrical core 301 are exposed to the outside of the coil 302.
Of course, when the coil 302 is wound around the outer circumferences of the two first cylindrical cores 301, the coil 302 may be wound around the middle portion of the first cylindrical cores 301 and one end portion thereof, and the other end portion may be exposed to the outside of the coil 302. For example, the coil 302 may be wound around the middle and upper ends of the first cylindrical core 301, and the lower end of the first cylindrical core 301 is exposed to the outside of the coil 302, so that the magnetic field may be guided closer to the magnetic stimulation site; alternatively, the coil 302 may be wound around the middle portion and the lower end of the first cylindrical magnetic core 301, where the upper end of the first cylindrical magnetic core 301 is exposed outside the coil 302, as shown in the following drawings, for example, fig. 5 is a schematic structural diagram of the coil 302 provided by the present invention wound around the middle portion and the lower end of the first cylindrical magnetic core 301, and the upper end is exposed outside the coil 302, so that the ineffective magnetic field energy at the upper end of the first cylindrical magnetic core 301 can be reduced; correspondingly, the magnetic stimulation device 30 shown in fig. 5 can be seen in fig. 6, and fig. 6 is a schematic diagram of magnetic stimulation intensity provided by the present invention.
In a possible scenario, based on the embodiment shown in fig. 3, in order to further reduce the weight of the magnetic stimulation device 30 based on the magnetic stimulation device 30 provided in the embodiment shown in fig. 3, the magnetic induction intensity distribution is observed to find that the central portion of the first cylindrical magnetic core 301 is weak, and the central material of the first cylindrical magnetic core 301 may be removed without causing saturation of the magnetic core, so that the through hole is disposed in the first cylindrical magnetic core 301 along the axial direction, and a toroidal cylindrical magnetic core is formed, thereby achieving the purpose of reducing the weight of the magnetic stimulation device 30 by the toroidal cylindrical magnetic core provided with the through hole.
For example, when the through hole is provided in the axial direction inside the first cylindrical magnetic core 301, the diameter of the through hole may be any value in the range of 1cm to 2cm, as long as it is smaller than the diameter of the first cylindrical magnetic core 301, and may be specifically set according to actual needs.
In a possible scenario, based on the embodiment shown in fig. 3, in order to further improve the stimulation intensity of the magnetic stimulation device 30 and reduce the magnetic resistance based on the magnetic stimulation device 30 provided in the embodiment shown in fig. 3, a second cylindrical magnetic core 303 is disposed at the top of each of the two first cylindrical magnetic cores 301, that is, one second cylindrical magnetic core is disposed at the top of each of the two first cylindrical magnetic cores, the first cylindrical magnetic cores 301 and the second cylindrical magnetic cores 303 are coaxially disposed, and the diameter of the second cylindrical magnetic cores 303 is larger than that of the first cylindrical magnetic cores 301. For example, referring to fig. 7, fig. 7 is a schematic diagram of a front view of a first cylindrical magnetic core 301 and a second cylindrical magnetic core 303 according to the present invention, and it can be seen in conjunction with fig. 7 that the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 form a "T" type double cylindrical magnetic core. It will be appreciated that the coil 302 is not wound around the second cylindrical core 303.
For example, the height of the second cylindrical magnetic core 303 may be any value within a range of 0.5cm-3cm, the diameter of the second cylindrical magnetic core 303 may be any value within a range of 2cm-5cm, and the diameter of the second cylindrical magnetic core 303 is larger than the diameter of the first cylindrical magnetic core 301, which may be specifically set according to practical needs.
In the embodiment of the present invention, the "T" type double-cylindrical magnetic core formed by the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 may be two cylindrical magnetic cores that are produced separately, and one "T" type double-cylindrical magnetic core is obtained by combining the two cylindrical magnetic cores; the T-shaped double-cylinder magnetic core can be produced by integrated molding, and can be specifically set according to actual needs, and the embodiment of the invention is not particularly limited.
For ease of understanding, fig. 8 is a schematic top view of the structure including the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 provided by the present invention, and fig. 9 is a schematic bottom view of the structure including the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 provided by the present invention, and as can be seen in fig. 8 and 9, the second cylindrical magnetic core 303 is provided on top of the two first cylindrical magnetic cores 301 in the magnetic stimulation device 30, the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 are coaxially arranged, and the diameter of the second cylindrical magnetic core 303 is larger than that of the first cylindrical magnetic core 301.
In connection with the magnetic stimulation device 30 shown in fig. 7, by providing the second cylindrical magnetic cores 303 on top of the two first cylindrical magnetic cores 301, the magnetic stimulation intensity provided by the corresponding magnetic stimulation device 30 can be raised from 0.27T (hollow) to 0.46T at about 2cm below the coil 302, compared to the magnetic stimulation intensity provided by the coil 302, and the weight increase is within an acceptable range due to the small increase in the magnetic core volume.
In this possible scenario, when the coil 302 in the "T" type double-cylindrical magnetic core is wound around only the middle portion and the lower end of the first cylindrical magnetic core 301, and the upper end is exposed outside the coil 302, the corresponding magnetic stimulation intensity can be seen in fig. 10, and fig. 10 is a schematic diagram of the magnetic stimulation intensity provided by the present invention, and compared with the magnetic stimulation intensity shown in fig. 6, the magnetic stimulation intensity is significantly enhanced.
In one possible scenario, in combination with the magnetic stimulation device 30 shown in fig. 7, in order to further reduce the weight of the magnetic stimulation device 30, it is found by observing the magnetic induction intensity distribution that the central portion of the first cylindrical magnetic core 301 is weaker in magnetic induction intensity, and the central materials of the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 can be removed without causing saturation of the magnetic cores, so that the inside of each of the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 is provided with a through hole in the axial direction, and the tip of the first cylindrical magnetic core 301 is disposed in the through hole of the second cylindrical magnetic core 303. As an example, referring to fig. 11 and 12, fig. 11 is a schematic top view of a first cylindrical magnetic core 301 and a second cylindrical magnetic core 303 provided with through holes according to the present invention, and fig. 12 is a schematic bottom view of the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 provided with through holes according to the present invention, and as can be seen in conjunction with fig. 11 and 12, the first cylindrical magnetic core 301 and the second cylindrical magnetic core 303 are each provided with through holes along the axial direction, and the top end of the first cylindrical magnetic core 301 is disposed in the through hole of the second cylindrical magnetic core 303, and the purpose of reducing the weight of the magnetic stimulation device 30 can be effectively achieved by the annular cylindrical magnetic core provided with through holes.
In this possible scenario, the diameter of the through-hole of the second cylindrical magnetic core 303 may be approximately equal to the diameter of the first cylindrical magnetic core 301, such that the tip of the first cylindrical magnetic core 301 may be disposed within the through-hole of the second cylindrical magnetic core 303, for example. For example, the diameter of the through hole of the first cylindrical core 301 may be any value within a range of 1cm to 2cm, so long as it is smaller than the diameter of the first cylindrical core 301, and the diameter of the through hole provided by the second cylindrical core 303 may be determined according to the diameter of the through hole of the first cylindrical core 301, so long as it is smaller than the diameter of the second cylindrical core 303, and may be specifically set according to actual needs.
In one possible scenario, for example, in combination with the magnetic stimulation device 30 shown in fig. 7, considering that the central portion of the side of the second cylindrical magnetic core 303 facing away from the first cylindrical magnetic core 301 is weak in magnetic induction intensity and fails to sufficiently perform the function of the magnetic core, the core of the central portion may be hollowed out for further weight reduction so that the side of the second cylindrical magnetic core 303 facing away from the first cylindrical magnetic core 301 has a concave portion, which may be a frustum-shaped concave portion; in addition, in order to guide the magnetic field to approach the stimulated site, thereby improving the stimulation intensity, the truncated cone may be moved to a side of the first cylindrical magnetic core 301 facing away from the second cylindrical magnetic core 303, such that a convex portion is formed on a side of the first cylindrical magnetic core 301 facing away from the second cylindrical magnetic core 303, and the concave portion and the convex portion are coupled to each other. As an example, referring to fig. 13, fig. 13 is a schematic diagram showing a front view of a magnetic stimulation device 30 provided with concave and convex portions according to the present invention, and, as can be seen in conjunction with fig. 13, a side of a second cylindrical magnetic core 303 facing away from a first cylindrical magnetic core 301 has a concave portion, and a side of the first cylindrical magnetic core 301 facing away from the second cylindrical magnetic core 303 is formed with a convex portion.
Assuming that the magnetic stimulation intensity at about 2cm below the coil 302 of the magnetic stimulation device 30 shown in fig. 7 is 0.37T, by providing a concave portion on one side of the second cylindrical magnetic core 303 and a convex portion on one side of the first cylindrical magnetic core 301, the concave portion and the convex portion can be coupled to each other, for example, see the magnetic stimulation device 30 shown in fig. 13, whose magnetic stimulation intensity at about 2cm below the coil 302 is 0.45T.
In one possible scenario, in conjunction with the magnetic stimulation device 30 shown in fig. 7, when the stimulation portion is magnetically stimulated, since the magnetic stimulation portion is arc-shaped and the axes of the two first cylindrical magnetic cores 301 are on the same horizontal line, the magnetic stimulation device 30 is not only large in size, but also cannot be well attached to the stimulation portion, so that the magnetic stimulation strength and depth are affected. In order to reduce the volume of the magnetic stimulation device 30 and make the magnetic stimulation device 30 better fit the stimulation site, the two first cylindrical magnetic cores 301 may be bent inwards, so that the axes of the two first cylindrical magnetic cores 301 form a predetermined included angle, and one side of the two first cylindrical magnetic cores 301 facing the target object is tangential to the stimulation site of the target object, and the second cylindrical magnetic core 303 is located on one side of the first cylindrical magnetic cores 301 facing away from the stimulation site, thereby forming a biconical magnetic stimulation. For example, referring to fig. 14, fig. 14 is a schematic diagram showing a relationship between a magnetic stimulation device 30 and a stimulation site provided by the present invention, so that although partial focusing is sacrificed, the height of the magnetic stimulation device 30 can be reduced, so that the magnetic stimulation device 30 can be better attached to the stimulation site, thereby effectively improving the magnetic stimulation intensity and depth.
The value of the predetermined included angle can be set according to actual needs, and the embodiment of the invention is not particularly limited.
In this possible scenario, for example, when the coil 302 in the magnetic stimulation device 30 shown in fig. 14 is wound around only the middle portion and the lower end of the first cylindrical magnetic core 301, and the upper end is exposed outside the coil 302, the corresponding magnetic stimulation intensity can be shown in fig. 15, and fig. 15 is a schematic diagram of the magnetic stimulation intensity provided by the present invention, and compared with the magnetic stimulation intensity shown in fig. 10, the magnetic stimulation intensity is significantly enhanced.
Based on any one of the possible scenarios described above, for the magnetic stimulation device 30 shown in any one of the possible scenarios, the coil 302 may include at least two possible winding modes in which the two first cylindrical cores 301 each share one coil 302 when wound around the outer circumferences of the two first cylindrical cores 301, respectively.
In one possible winding manner, a winding manner of a single-layer disc-shaped 8-shaped coil 302 may be adopted, and the winding manner is respectively wound on the outer circumferences of the two first cylindrical magnetic cores 301, specifically: the coil 302 is wound in a single layer in the axial direction of the two first cylindrical magnetic cores 301, is wound in multiple layers in the radial direction, and two wire ends of the coil 302 are respectively led out from the inner ring of the circular coil 302 which is tightly attached to the first cylindrical magnetic cores 301; wherein the current directions in the two circular coils 302 wound around the two first cylindrical cores 301 are opposite.
In this possible winding manner, each circular coil 302 of the figure 8 coil 302 comprises a layer of disc-shaped coil 302, and the coil 302 may be wound with flat copper wire or litz wire, which is lighter and more advantageous for reducing the weight of the magnetic stimulation device 30 in the case of the same ac resistance. In addition, in order to reduce the resistive loss of the coil 302, it is necessary to increase the sectional area of the wire as much as possible to reduce the alternating current resistance, and it is possible to make wider and thinner flat copper wires or rectangular litz wires and to achieve multilayer winding in the radial direction of the two first cylindrical cores 301 using the wider and thinner flat copper wires or rectangular litz wires.
In another possible winding manner, a winding manner of a double-layer disc-shaped 8-shaped coil 302 may be adopted, and the two coils are wound around the outer circumferences of the two first cylindrical magnetic cores 301 respectively, specifically: the coil 302 is wound in multiple layers in the axial direction of the two first cylindrical cores 301, and radially in multiple layers; when the multi-layer winding is an odd-layer winding in the axial direction, the two wire ends of the coil are respectively led out from the circular coil inner ring facing away from the first cylindrical magnetic core 301; when the multi-layer winding is an even-numbered layer winding in the axial direction, the two wire ends of the coil are respectively led out from the circular coil outer ring facing away from the first cylindrical core 301. Wherein the current directions in the two circular coils wound around the two first cylindrical cores 301 are opposite.
In this possible winding approach, each circular coil 302 of the figure 8 coil 302 comprises at least two layers of disc shaped coils 302 and is connected at an inner loop, the two circular coils 302 being connected at an outer loop tangent, thereby forming a double layer disc shaped figure 8 coil 302. Compared with the single-layer disc-shaped 8-shaped coil 302, the number of turns of each layer of the double-layer coil 302 is smaller, thicker wires and low-cost round litz wires are used, and the loss of the coil 302 can be effectively reduced; meanwhile, the outgoing lines of the coils 302 are all led out from the outer ring of the coils 302, so that the thickness of the coils 302 cannot be increased, and wiring is more convenient.
The present invention also provides a magnetic stimulation device, which may include, for example: a housing, and a magnetic stimulation device disposed within the housing; the implementation principle and the beneficial effects of the magnetic stimulation device are similar to those of the magnetic stimulation device, and reference can be made to the implementation principle and the beneficial effects of the magnetic stimulation device, so that redundant description is omitted here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A magnetic stimulation device, comprising:
the coils are respectively wound on the peripheries of the two first cylindrical magnetic cores;
wherein the coil is used for generating a magnetic field when current passes through the coil;
the first cylindrical magnetic core is used for strengthening the magnetic field so as to stimulate a target object through the strengthened magnetic field;
the magnetic stimulation device further comprises second cylindrical magnetic cores which are respectively arranged at the tops of the two first cylindrical magnetic cores, the first cylindrical magnetic cores and the second cylindrical magnetic cores are coaxially arranged, and the diameter of the second cylindrical magnetic cores is larger than that of the first cylindrical magnetic cores.
2. The device of claim 1, wherein the magnetic stimulation device,
the coil is wound on the middle part of the first cylindrical magnetic core, and two ends of the first cylindrical magnetic core are exposed outside the coil.
3. A magnetic stimulation device according to claim 1 or 2, characterized in that,
the first cylindrical magnetic core is internally provided with a through hole along the axial direction.
4. The device of claim 1, wherein the magnetic stimulation device,
the first cylindrical magnetic core and the second cylindrical magnetic core are axially provided with through holes, and the top end of the first cylindrical magnetic core is arranged in the through hole of the second cylindrical magnetic core.
5. The device of claim 1, wherein the magnetic stimulation device,
the side of the second cylindrical magnetic core, which is away from the first cylindrical magnetic core, is provided with a concave part, and the side of the first cylindrical magnetic core, which is away from the second cylindrical magnetic core, is provided with a convex part.
6. The device of claim 1, wherein the magnetic stimulation device,
the axes of the two first cylindrical magnetic cores form a preset included angle, one side of the two first cylindrical magnetic cores, which faces the target object, is tangent to the stimulation part of the target object, and the second cylindrical magnetic core is positioned on one side of the first cylindrical magnetic core, which faces away from the stimulation part.
7. A magnetic stimulation device according to claim 1 or 2, characterized in that,
the coils are wound in a single layer in the axial direction of the two first cylindrical magnetic cores, are wound in multiple layers in the radial direction, and two wire heads of the coils are respectively led out from the inner ring of the circular coil which is tightly attached to the first cylindrical magnetic cores;
wherein the directions of currents in the two circular coils wound around the two first cylindrical cores are opposite.
8. A magnetic stimulation device according to claim 1 or 2, characterized in that,
the coils are wound in multiple layers in the axial direction of the two first cylindrical magnetic cores, and are wound in multiple layers in the radial direction; when the multi-layer winding is an odd-layer winding in the axial direction, two wire heads of the coil are respectively led out from the inner ring of the circular coil deviating from the first cylindrical magnetic core; when the multi-layer winding is an even-number-layer winding in the axial direction, two wire heads of the coil are respectively led out from a circular coil outer ring deviating from the first cylindrical magnetic core;
wherein the directions of currents in the two circular coils wound around the two first cylindrical cores are opposite.
9. A magnetic stimulation device, comprising: a housing, and a magnetic stimulation device disposed within the housing; wherein the magnetic stimulation device is the magnetic stimulation device according to any of the preceding claims 1-8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210744897.3A CN115282489B (en) | 2022-06-27 | 2022-06-27 | Magnetic stimulation device and magnetic stimulation equipment |
| PCT/CN2022/125021 WO2024000925A1 (en) | 2022-06-27 | 2022-10-13 | Magnetic stimulation device and magnetic stimulation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210744897.3A CN115282489B (en) | 2022-06-27 | 2022-06-27 | Magnetic stimulation device and magnetic stimulation equipment |
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| Publication Number | Publication Date |
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| CN115282489A CN115282489A (en) | 2022-11-04 |
| CN115282489B true CN115282489B (en) | 2023-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210744897.3A Active CN115282489B (en) | 2022-06-27 | 2022-06-27 | Magnetic stimulation device and magnetic stimulation equipment |
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| Country | Link |
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| CN (1) | CN115282489B (en) |
| WO (1) | WO2024000925A1 (en) |
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| JPH07171220A (en) * | 1993-12-17 | 1995-07-11 | Akio Nagano | Magnetic stimulation apparatus |
| RU2240157C1 (en) * | 2003-09-09 | 2004-11-20 | Государственное образовательное учреждение высшего профессионального образования "Московский государственный институт стали и сплавов" (технологический университет) | Magnetic system operating in pulsating mode |
| JP2012000341A (en) * | 2010-06-18 | 2012-01-05 | Nishi Nippon Electric Wire & Cable Co Ltd | Magnetic stimulation coil |
| CN206228772U (en) * | 2017-04-10 | 2017-06-09 | 甘景梨 | A kind of transcranial magnetic stimulation new coil device |
| CN113679948A (en) * | 2021-08-30 | 2021-11-23 | 华南理工大学 | 8-shaped transcranial magnetic stimulation coil, magnetic stimulation device and magnetic stimulation system |
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| JPH10290843A (en) * | 1997-04-18 | 1998-11-04 | Nippon Koden Corp | Magnetic stimulus coil for living body |
| WO2000006252A1 (en) * | 1998-07-28 | 2000-02-10 | Pulse Medical Co., Ltd. | Electromagnet for magnetotherapeutic device, coil for magnetotherapeutic device, and magnetotherapeutic device |
| JP2016187364A (en) * | 2013-09-20 | 2016-11-04 | 第一高周波工業株式会社 | Magnetic flux irradiation device |
| CN107412955B (en) * | 2017-08-30 | 2023-05-23 | 华南理工大学 | Alternating permanent magnetic field sleep therapeutic instrument |
| CN109621208A (en) * | 2018-12-29 | 2019-04-16 | 北京神畅科技发展有限公司 | A kind of hollow core coil for transcranial magnetic stimulation |
| US11534620B2 (en) * | 2020-02-24 | 2022-12-27 | Hsuan-Hua Chiu | Magnetic stimulation device having planar coil structure |
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2022
- 2022-06-27 CN CN202210744897.3A patent/CN115282489B/en active Active
- 2022-10-13 WO PCT/CN2022/125021 patent/WO2024000925A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07171220A (en) * | 1993-12-17 | 1995-07-11 | Akio Nagano | Magnetic stimulation apparatus |
| RU2240157C1 (en) * | 2003-09-09 | 2004-11-20 | Государственное образовательное учреждение высшего профессионального образования "Московский государственный институт стали и сплавов" (технологический университет) | Magnetic system operating in pulsating mode |
| JP2012000341A (en) * | 2010-06-18 | 2012-01-05 | Nishi Nippon Electric Wire & Cable Co Ltd | Magnetic stimulation coil |
| CN206228772U (en) * | 2017-04-10 | 2017-06-09 | 甘景梨 | A kind of transcranial magnetic stimulation new coil device |
| CN113679948A (en) * | 2021-08-30 | 2021-11-23 | 华南理工大学 | 8-shaped transcranial magnetic stimulation coil, magnetic stimulation device and magnetic stimulation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115282489A (en) | 2022-11-04 |
| WO2024000925A1 (en) | 2024-01-04 |
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